using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ModelController : MonoBehaviour
{
    public Transform imgModel;

    public GameObject model; // 要交互的模型

    public Transform cameraTransform;

    public float rotateSpeed = 2f; // 旋转速度
    public float scaleSpeed = 0.1f; // 缩放速度
    public float maxScale = 5f;
    public float minScale = 1f;

    public static bool CanControl = true;

    private Vector3 oldPosition;
    private Vector3 oldRotation;

    // 旋转使用变量
    Vector3 mPrevPos = Vector3.zero;
    Vector3 mPosDelta = Vector3.zero;

    // 缩放使用变量
    Vector2 finger1Position;
    Vector2 finger2Position;
    float scroll;
    float currentScale = 1f;

    Vector3 tmpPos;

    bool isTouchDown;
    bool isFirst = true;
    float x, y;

    private void Update()
    {
        if (!ModelPlayerEx.Instance.IsDetailShow && CanControl &&
            model != null && ModelPlayerEx.Instance.ModelSeted)
        {
            if (Input.GetMouseButton(0) || (Input.touchCount == 1 && Input.GetTouch(0).phase == TouchPhase.Moved))
            {
                //if (isFirst)
                //{
                //    isFirst = false;
                //    mPrevPos = Input.mousePosition;
                //}
                //mPrevPos = Input.mousePosition;
                //mPosDelta = Input.mousePosition - mPrevPos;

                x = Input.GetAxis("Mouse X") * rotateSpeed;
                y = Input.GetAxis("Mouse Y") * rotateSpeed;
                model.transform.Rotate(Camera.main.transform.up, -x * rotateSpeed, Space.World);
                model.transform.Rotate(Camera.main.transform.right, y * rotateSpeed, Space.World);
            }

            //mPrevPos = Input.mousePosition;


            if (Input.touchCount == 2)
            {
                Touch touch1 = Input.GetTouch(0);
                Touch touch2 = Input.GetTouch(1);

                // 更新手指位置
                finger1Position = touch1.position;
                finger2Position = touch2.position;

                // 计算当前手指距离和上一帧手指距离的差值，来计算缩放比例
                float distance = Vector2.Distance(finger1Position, finger2Position);
                float previousDistance = Vector2.Distance(finger1Position - touch1.deltaPosition, finger2Position - touch2.deltaPosition);
                scroll = (previousDistance - distance) / 5f;
            }
            else
            {
                scroll = Input.GetAxis("Mouse ScrollWheel");
            }

            if (scroll >= 0.1f)
            {
                currentScale *= (1f + scaleSpeed);
                if (currentScale > maxScale)
                    currentScale = maxScale;
                //model.transform.localScale = Vector3.one * currentScale;
                imgModel.transform.localScale = Vector3.one * currentScale;
            }
            else if (scroll <= -0.1f)
            {
                currentScale /= (1f + scaleSpeed);
                if (currentScale < minScale)
                    currentScale = minScale;
                //model.transform.localScale = Vector3.one * currentScale;
                imgModel.transform.localScale = Vector3.one * currentScale;
            }
        }
    }
}